The results showed that grain boundary width and grain boundary form of the aluminum alloy would change during superplastic deformation.

结果表明，此状态下的铝合金在超塑性变形过程中晶界宽度和形态会发生改变。

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As an attempt of grain boundary control, this method is a new ceramic powder fabrication technology having great significance.

这种技术作为晶界控制的尝试，是一种具有重大意义的新的陶瓷粉体制备技术。

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Experimental results indicate that cavities are formed during superplastic deformation due to the inconsistency of grain boundary sliding.

实验结果表明，孔洞是由于超塑性拉伸变形中品界滑动不协调而引起的。

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The engine had been running at high temperatures for four times longer than a normal F-35 flight, causing a separation of the "grain boundary" on one blade, Mr Bates explained.

BBC: Grounded US F-35 fighter jet fleet to resume flights